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A 3 m long wire of radius 3 mm shows an extension of 0.1 mm when loaded vertically by a mass of 50 kg in an experiment to determine Young's modulus. The value of Young's modulus of the wire as per this experiment is Nm, where the value of is: (Take m/s)
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Water falls from a height of
200 m into a pool. Calculate the rise in temperature of the water assuming no heat dissipation from
the water in the pool.
(Take g = 10 m/s2, specific heat of water = 4200 J/(kg K))
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A particle moves in a straight line with constant acceleration. If it covers 20 m in the first 4 seconds and 60 m in the next 4 seconds, find the initial velocity and acceleration of the particle.
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